I was trying to replace the background universe with a customize pic while zooming out in the scene view. But it seems has no documents introducing how can I do that.
hmm now I wonder in which software you need to do this. If it happens to be the ArcGIS API for JavaScript, then in one month we will have this feature. So watch out for version 4.8. In the SceneViewer in ArcGIS Online we won't have that functionality yet.
In any case, I'd be curious to hear about your use case for setting an image behind the scene.
I'm so thrilled to have this feature in the following month. We just want to change the background to fit in our web page design.
I like to dark universe which gives us a sense of mystery. However, our whole website is designed with warm and light colors. So we want to change the color.
one more month to go with a dark universe hehe